unbound: increase check interval to 30s

data/Dockerfiles/unbound/Dockerfile

@@ -20,10 +20,10 @@ EXPOSE 53/udp 53/tcp
 
 COPY docker-entrypoint.sh /docker-entrypoint.sh
 
-# healthcheck (nslookup)
+# healthcheck (dig, ping, nc)
 COPY healthcheck.sh /healthcheck.sh
 RUN chmod +x /healthcheck.sh
-HEALTHCHECK --interval=5s --timeout=30s CMD [ "/healthcheck.sh" ]
+HEALTHCHECK --interval=30s --timeout=30s CMD [ "/healthcheck.sh" ]
 
 ENTRYPOINT ["/docker-entrypoint.sh"]
 

docker-compose.yml

@@ -2,7 +2,7 @@ version: '2.1'
 services:
 
     unbound-mailcow:
-      image: mailcow/unbound:1.20
+      image: mailcow/unbound:1.21
       environment:
         - TZ=${TZ}
         - SKIP_UNBOUND_HEALTHCHECK=${SKIP_UNBOUND_HEALTHCHECK:-n}